计算下面各题(能简算的要简算)
来源:学生作业帮 编辑:搜搜考试网作业帮 分类:数学作业 时间:2024/07/11 17:31:35
计算下面各题(能简算的要简算)
(1)7.05×23.7+7.05×76.3
(2)0.125×3.2×2.5
(3)(12+23.1÷0.75)×0.4-5.12
(4)1.6×[(12-7.2)÷(0.84÷2.1)].
(1)7.05×23.7+7.05×76.3
(2)0.125×3.2×2.5
(3)(12+23.1÷0.75)×0.4-5.12
(4)1.6×[(12-7.2)÷(0.84÷2.1)].
![计算下面各题(能简算的要简算)](/uploads/image/z/7645737-57-7.jpg?t=%E8%AE%A1%E7%AE%97%E4%B8%8B%E9%9D%A2%E5%90%84%E9%A2%98%EF%BC%88%E8%83%BD%E7%AE%80%E7%AE%97%E7%9A%84%E8%A6%81%E7%AE%80%E7%AE%97%EF%BC%89)
(1)7.05×23.7+7.05×76.3,
=7.05×(23.7+76.3),
=7.05×100,
=705;
(2)0.125×3.2×2.5,
=0.125×8×0.4×2.5,
=1×1,
=1;
(3)(12+23.1÷0.75)×0.4-5.12,
=(12+30.8)×0.4-5.12,
=42.8×0.4-5.12,
=17.12-5.12,
=12;
(4)1.6×[(12-7.2)÷(0.84÷2.1)],
=1.6×[4.8÷0.4],
=1.6×12,
=19.2.
=7.05×(23.7+76.3),
=7.05×100,
=705;
(2)0.125×3.2×2.5,
=0.125×8×0.4×2.5,
=1×1,
=1;
(3)(12+23.1÷0.75)×0.4-5.12,
=(12+30.8)×0.4-5.12,
=42.8×0.4-5.12,
=17.12-5.12,
=12;
(4)1.6×[(12-7.2)÷(0.84÷2.1)],
=1.6×[4.8÷0.4],
=1.6×12,
=19.2.